TIANJIN, July 2 (Xinhua) -- A bus carrying 30 people rushed out of an expressway Friday night in north China's Tianjin City, and only four people were found alive as of 2 a.m. Saturday, according to rescuers.

The survivors include a ticket seller, a copilot and two passengers.

They said the long-distance bus broke the guardrail at the Baodi section of the Tianjin-Jixian expressway and fell into a ditch.

Rescue is going on with the presence of two vice mayors of Tianjin.